The present invention is a composition of spherical fine particles comprising a wall material and at least one cavity containing gas and / or liquid and having pores on the surface, the spherical fine particles having an average particle diameter of 10 to 600 μm. And at least 80% of the fine particles having a particle size of which the deviation of the fine particles of the composition from the average particle size is 20% or less is within the range of 1/5000 to 1/5 of the average particle size. Having an average of at least 10 pores having a diameter, the pores having a diameter of at least 20 nm, and the wall material comprising a composition comprising at least one aliphatic-aromatic polyester, It relates to a composition of spherical microparticles in which the wall material has a solubility in dichloromethane of at least 50 g / L at 25 ° C., its production process and its use. [Selection figure] None本発明は、壁材料、並びに気体及び／又は液体を含む少なくとも一個の空洞から構成され、表面に孔を有する球状微粒子の組成物であって、前記球状微粒子が１０～６００μｍの平均粒子径を有し、前記組成物の前記微粒子の前記平均粒子径からの逸脱が２０％以下である粒子径を有する微粒子の少なくとも８０％がそれぞれ、前記平均粒子径の１／５０００～１／５の範囲内の直径を有する孔を平均して少なくとも１０個有し、さらに、これらの孔の直径が少なくとも２０ｎｍであり、前記壁材料が、少なくとも１種の脂肪族－芳香族ポリエステルを含む組成物からなり、前記壁材料のジクロロメタン中の溶解度が２５℃において少なくとも５０ｇ／Ｌである球状微粒子の組成物と、その製造プロセスと、その使用に関する。【選択図】なし
